Re: Mac HD #M0135

[shack@deimos.frii.com (Randy Shackelford)]

In article <5iqh6k$bvl$1@news.vanderbilt.edu>,
Tilghman Lesher <NO%lesh%SPAM%erjt%HERE@vuse.vanderbilt.edu> wrote:
>thedm (thedm@idir.net) wrote:
>
>: SCSI is SCSI I see no reason why the MAC 20 HD wont work, but you will have
>: to use and internal scsi card and put the MAC 20 HD in an external Case.

Man it would be cool if people would figure out what's being discussed before
opening their mouths (fingers?). A hard disk 20 is an external 20 mb hard disk
that plugs into the floppy port on pre-SCSI Macs. Not to be confused with
the HD20SC, the first external SCSI hard disk, or the 20 mb Miniscribe SCSI
mechs which came in the first SEs with internal drives.

>SCSI may be SCSI, but there are several types of SCSI.  The one used
>most frequently in Apple II's in SCSI-II.  I think there's now a SCSI-III
>standard.  Of course, there is also SCSI-I, and SASI (pre-SCSI).

Who told you that Apple IIs use SCSI-II? They can use the drives, but they
fall back to SCSI-I when  you connect 'em up to a SCSI card. Apple IIs are
not  fast enough to keep up with SCSI-I throughput so it would be utterly
pointless to implement SCSI-II on 'em.

>The HD20 may be SCSI-I or SASI.

When I was looking to buy one, someone told me they use the MFM style hard
disk like PCs from the same era.
-- 
Randy Shackelford                                 
shack@frii.com